// The graphic can be drawn with a DataContracts.Geometry object
// using AddGraphic(DataContracts.Geometry, Symbol, MapTip, 
//                  IEnumerable<KeyValuePair<string,object>> Attributes)
GraphicsManager graphicsManager = GraphicManagerFactory.CreateGraphicsManager();
graphicsManager.AddGraphic(geometry, null, null, null);

// or with a Feature using AddGraphic(Feature, Symbol, MapTip)
graphicsManager.AddGraphic(feature, null, null);

bool isDrawing = false;

GraphicsManager graphicsManager = GraphicManagerFactory.CreateGraphicsManager();

GeometrySelectionService geometryService = new GeometrySelectionService(
                                    new GeometrySelectionServiceConfiguration 
                                        { 
                                            ShowLabels = true, 
                                            Color = Colors.Green 
                                        });

private void DrawCompleteCallback(DataContracts.Geometry geometry)
{
    isDrawing = false;
    graphicsManager.AddGraphic(geometry, SymbolManager.GetFillSymbol("#FF0000"), null, null);
}

if (isDrawing)
{ geometryService.CancelSelection(); }
isDrawing = true;

// This example uses the DrawCompleteCallback
geometryService.SelectGeometry(GeometryType.Polyline, DrawCompleteCallback);

// The same thing using a lambda expression
geometryService.SelectGeometry(GeometryType.Polyline, g =>
{
    // The drawing is done, so set the flag and add the graphic to the map.
    // Note that the symbol, map tip, and attributes can also be set on the drawing object here.
    isDrawing = false;
    graphicsManager.AddGraphic(g, null, null, null);
});

private void GeometryChangeDelegate(object sender, GeometryChangedEventArgs e)
{
    // We can get a reference to the geometry being drawn from the GeometryChangedEventArgs
    DataContracts.Geometry envelope = e.CurrentGeometry;

    // And do something with the object as it's being drawn.  The following uses the MeasureManager to
    // calculcate the perimiter and area of the envelope.
    DataContracts.Geometry polygon = GeometryTranslator.ConvertEnvelopeToPolygon(envelope);
    Area = Math.Round(MeasureManager.GetMeasureManager(_linearUnit, _areaUnit).GetPolygonArea(polygon), 2).ToString();
    Perimeter = Math.Round(MeasureManager.GetMeasureManager(_linearUnit, _areaUnit).GetPerimeter(polygon), 2).ToString();
}

geometryService.SelectGeometry(GeometryType.Box, DrawCompleteCallback, 
                               "Select geometry for measurement.", GeometryChangeDelegate, 
                               Unit.Mile, SquareUnit.SquareMile);